Is Microsoft Defender crashing on your PC? A bad update is breaking scans

Microsoft has asserted that the built-in security tool within Windows 11 is sufficient for the majority of PC users. However, this assertion hinges on the functionality of the tool itself. A recent issue has emerged, affecting certain PCs and preventing security scans from being completed, which could leave systems exposed to potential vulnerabilities.

Details of the Issue

The problem first gained attention on Reddit, where a user by the name of Huynh_Jovi reported difficulties in executing scans with Microsoft Defender. This concern resonated with several other users in the thread, indicating that both Full Scan and Quick Scan functionalities are experiencing disruptions.

One user, goretsky, commented, “It appears Microsoft released a bad update to Windows Defender, causing it to crash a few seconds after attempting to perform a Full Scan or Quick Scan.” They further noted that offline scans tend to halt at approximately 90-93% completion. Additionally, the latest version of the Microsoft Safety Scanner seems to be impacted as well.

Potential Causes and Solutions

While the precise cause of this issue remains unclear, there are several theories circulating among users. It appears that the problem may be linked to a Microsoft Security Intelligence update. According to Reddit users Schoonie84 and Master_Pie1940, upgrading to Security Intelligence Update v1.457.236.0 has reportedly resolved the issue for some affected users.

As the situation continues to unfold, users are encouraged to stay informed and share their experiences. For further discussions and insights, consider joining the conversation on Reddit at r/WindowsCentral.

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